Edit C:\apache-ant-1.8.0\docs\manual\CoreTasks\echo.html
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See the License for the specific language governing permissions and limitations under the License. --> <html> <head> <meta http-equiv="Content-Language" content="en-us"> <link rel="stylesheet" type="text/css" href="../stylesheets/style.css"> <title>Echo Task</title> </head> <body> <h2><a name="echo">Echo</a></h2> <h3>Description</h3> <p>Echoes a message to the current loggers and listeners which means <tt>System.out</tt> unless overridden. A <tt>level</tt> can be specified, which controls at what logging level the message is filtered at. <p> The task can also echo to a file, in which case the option to append rather than overwrite the file is available, and the <tt>level</tt> option is ignored</p> <h3>Parameters</h3> <table border="1" cellpadding="2" cellspacing="0"> <tr> <td valign="top"><b>Attribute</b></td> <td valign="top"><b>Description</b></td> <td align="center" valign="top"><b>Required</b></td> </tr> <tr> <td valign="top">message</td> <td valign="top">the message to echo.</td> <td valign="top" align="center">No. Text may also be included in a character section within this element. If neither is included a blank line will be emitted in the output.</td> </tr> <tr> <td valign="top">file</td> <td valign="top">the file to write the message to.</td> <td valign="top" align="center" rowspan="2">Optionally one of these may be specified.</td> </tr> <tr> <td valign="top">output</td> <td valign="top">the <a href="../CoreTypes/resources.html">Resource</a> to write the message to (see <a href="../develop.html#set-magic">note</a>). <b>Since Ant 1.8</b></td> </tr> <tr> <td valign="top">append</td> <td valign="top">Append to an existing file (or <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/io/FileWriter.html#FileWriter(java.lang.String, boolean)" target="_blank"> open a new file / overwrite an existing file</a>)? Default <i>false</i>. </td> <td valign="top" align="center">No; ignored unless <i>output</i> indicates a filesystem destination.</td> </tr> <tr> <td valign="top">level</td> <td valign="top">Control the level at which this message is reported. One of "error", "warning", "info", "verbose", "debug" (decreasing order)</td> <td valign="top" align="center">No - default is "warning".</td> </tr> <tr> <td valign="top">encoding</td> <td valign="top">encoding to use, default is ""; the local system encoding. <em>since Ant 1.7</em></td> <td valign="top" align="center">No</td> </tr> </table> <h3>Examples</h3> <pre> <echo message="Hello, world"/> </pre> <pre> <echo message="Embed a line break:${line.separator}"/> </pre> <pre> <echo>Embed another:${line.separator}</echo> </pre> <pre> <echo>This is a longer message stretching over two lines. </echo> </pre> <pre> <echo> This is a longer message stretching over three lines; the first line is a blank </echo> </pre> The newline immediately following the <echo> tag will be part of the output.<br> Newlines in character data within the content of an element are not discarded by XML parsers.<br> See <a href="http://www.w3.org/TR/2004/REC-xml-20040204/#sec-line-ends"> W3C Recommendation 04 February 2004 / End of Line handling </a> for more details. <pre><echo message="Deleting drive C:" level="debug"/></pre> A message which only appears in <tt>-debug</tt> mode. <pre><echo level="error"> Imminent failure in the antimatter containment facility. Please withdraw to safe location at least 50km away. </echo> </pre> A message which appears even in <tt>-quiet</tt> mode. <pre><echo file="runner.csh" append="false">#\!/bin/tcsh java-1.3.1 -mx1024m ${project.entrypoint} $$* </echo></pre> Generate a shell script by echoing to a file. Note the use of a double $ symbol to stop Ant filtering out the single $ during variable expansion <p>Depending on the loglevel Ant runs, messages are print out or silently ignored: <table> <tr> <th>Ant-Statement</th> <th>-quiet, -q</th> <th><i>no statement</th> <th>-verbose, -v</th> <th>-debug, -d</th> </tr> <tr> <td><pre><echo message="This is error message." level="error" /></pre></td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> </tr> <tr> <td><pre><echo message="This is warning message." /></pre></td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> </tr> <tr> <td><pre><echo message="This is warning message." level="warning" /></pre></td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> </tr> <tr> <td><pre><echo message="This is info message." level="info" /></pre></td> <td align="center">not logged</td> <td align="center">ok</td> <td align="center">ok</td> <td align="center">ok</td> </tr> <tr> <td><pre><echo message="This is verbose message." level="verbose" /></pre></td> <td align="center">not logged</td> <td align="center">not logged</td> <td align="center">ok</td> <td align="center">ok</td> </tr> <tr> <td><pre><echo message="This is debug message." level="debug" /></pre></td> <td align="center">not logged</td> <td align="center">not logged</td> <td align="center">not logged</td> <td align="center">ok</td> </tr> </table> </body> </html>
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